Vickie has a tumor that causes her to secrete excess amounts of the hormone ADH. Because of the elevated level of hormone , she exhibits increased blood pressure polycythemia decreased blood volume an increased heatocrit peripheral vasoconstriction
and hyponatremia. This condition is known as syndrome of inappropriate antidiuretic hormone secretion (SIADH).
The condition you described, where Vickie has a tumor that causes her to secrete excess amounts of the hormone ADH (antidiuretic hormone), leads to several physiological changes. Let's break down the effects step-by-step:
1. Increased blood pressure: ADH acts on the kidneys to increase the reabsorption of water, leading to increased water retention. This results in an increased blood volume, which subsequently increases blood pressure.
2. Polycythemia: Since ADH causes water retention, it also leads to a higher concentration of red blood cells in the blood. This condition is known as polycythemia, where there is an increase in the number of red blood cells.
3. Decreased blood volume: Although ADH causes water retention, it primarily leads to reabsorption of water, not other components of blood such as plasma or proteins. As a result, the blood volume (the overall amount of blood in the circulatory system) may be decreased.
4. Increased hematocrit: Hematocrit refers to the percentage of red blood cells in the total blood volume. Due to the increased concentration of red blood cells caused by polycythemia, the hematocrit level will also rise.
5. Peripheral vasoconstriction: ADH can cause vasoconstriction of blood vessels in the peripheral tissues. This narrowing of blood vessels leads to an increase in peripheral resistance, which further contributes to increased blood pressure.
To summarize, the excess secretion of ADH from Vickie's tumor causes increased blood pressure, polycythemia, decreased blood volume, increased hematocrit, and peripheral vasoconstriction. Please note that this response is meant for educational purposes only, and it is essential for Vickie to consult a healthcare professional for accurate diagnosis and treatment.